Django doesn't call model clean method

Question

I have a view, which creates models from CSV file. I've added clean method to the model class definition, but it isn't called when model is created.

Here is example of models.py:

class Run(models.Model):     name = models.CharField(max_length=120)     tested_build = models.ForeignKey('apps.Build')     timestamp_start = models.DateTimeField()     timestamp_end = models.DateTimeField()  class CommonMeasurement(models.Model):     timestamp = models.DateTimeField()     value = models.FloatField()     run = models.ForeignKey(Run)      def clean(self):         super(CommonMeasurement, self).clean()         print 'here we go'         if self.timestamp < self.run.timestamp_start or self.timestamp > self.run.timestamp_end:             raise django_excetions.ValidationError('Measurement is outside the run')   class ClientMeasurement(CommonMeasurement):     metric = models.ForeignKey(ClientMetric)     account = models.CharField(max_length=120, blank=True) 

Here is my Form View code examples:

class BaseMeasurementsUpload(generic_views.FormView):     template_name = 'upload.html'     models_to_upload = None         def get_success_url(self):         return self.request.get_full_path()      def form_valid(self, form):         uploader = getattr(importers, form.cleaned_data['uploader'])         try:             the_uploader = uploader(form.cleaned_data, self.models_to_upload)             upload_results = the_uploader.get_result_info()         except django_exceptions.ValidationError as e:             custom_errors = e         return render_to_response(self.template_name,                                   {'upload_results': upload_results,                                    'custom_errors': custom_errors},                                   context_instance=RequestContext(self.request))   class ClientMeasurementsUploadView(BaseMeasurementsUpload):     form_class = forms.ClientMeasurementsUploadForm     models_to_upload = models.ClientMeasurement      def get_form(self, form_class):         uploaders = (('MeasurementsSimpleCsv', importers.MeasurementsSimpleCsv.__doc__),                      ('ClientMeasurementsBulkCsv', importers.ClientMeasurementsBulkCsv.__doc__,))         if self.request.POST:             # get bound form             return self.form_class(uploaders,                                    self.request.POST,                                    self.request.FILES)         else:             return forms.ClientMeasurementsUploadForm(uploaders) 

importers perform actual validation and call create method for each model.

Answer 1

To call the model clean method we will override save method. Check the link: https://docs.djangoproject.com/en/2.0/ref/models/instances/#django.db.models.Model.clean

class CommonMeasurement(models.Model):     timestamp = models.DateTimeField()     value = models.FloatField()     run = models.ForeignKey(Run)      def clean(self):         if self.timestamp < self.run.timestamp_start or self.timestamp > self.run.timestamp_end:             raise django_excetions.ValidationError('Measurement is outside the run')      def save(self, *args, **kwargs):         self.full_clean()         return super(CommonMeasurement, self).save(*args, **kwargs) 

Answer 2

I've found a solution to override method:

class CommonMeasurement(models.Model):     timestamp = models.DateTimeField()     value = models.FloatField()     run = models.ForeignKey(Run)      objects = models.Manager()     analyzes = managers.MeasureStatManager()      def save(self, **kwargs):         self.clean()         return super(CommonMeasurement, self).save(**kwargs)      def clean(self):         super(CommonMeasurement, self).clean()         print 'here we go'         if self.timestamp < self.run.timestamp_start or self.timestamp > self.run.timestamp_end:             raise django_excetions.ValidationError('Measurement is outside the run') 

But I'm not sure that it can be a good decision.